Transformer.



S. E. JOHANNBSEN..

TRANSFORMER.

APPLIOATION rum) 1320.20, 1912.

Patented July 7, 1914.

Inventor: Svenc/ E.Johannes en,

His Jltitor'n y.

UNITED STATES PATENT omen.

SVEND JOH'ANNESEN, 0F rIr'rsrI LD, MASSACHUSETTS, ASSIGNOR 'ro GENERALELECTRIC COMPANY, .A CORPORATION OF NEW YORK.

TRANSFORMER.

T 0 all whom it may concern Be it known that I, SVEND E. JoHAiINEsnN, acitizen of the United States, residing at Pittsfield, county ofBerkshire, State, of Massachusetts, have invented certain new and usefulImprovements in Transformers, of which the following is a specification.

My invention relates to transformers and the object of my invention isto reduce the amount of material and'space required for a transformer ofa given capacity.

oretofore transformers have been so constructed that the primarywindings tend to induce flux only in substantially parallel planesthrough any given portion of the cores". I propose to constructtransformers having two sets of primary windings on a single core at apreferred or convenient angle to each other. The core is preferablylaminated in effect with respect to both sets of windings. Each primarythen tends to induce flux in the core at an angle to the flux which theother primary tends to produce; preferably this angle is a right angle.

By utilizing this feature in constructing transformers appreciableeconomy of materials and space may be achieved. The

specific forms which transformers involvmg my invention may assume aremany; I have herein following described one form of constructioninvolving my invention.

In the accompanying drawings forming a part of this-specification,Figure 1 is an elevation of a preferred form of transformer involving myinvention; Fig. 2 is a sectional view along the line 22 of Fig. 1; Fig.3 is a sectional view of the core sections taken along the 1ine'2-2 ofFig. 1, the core sections being separated, and Fig. 4; is an elevationof a partof the core.

The core 1 of this transformer 1s constructed of ring-shaped members 2,each of an annular cross-section as shown in Fig. 3. These ring members2 are discontinuous throughout their length, that is, each has at leastone opening transverse of its lepgth 'as shown at 3 in Figs. 1 and 4:.In the drawing two transverse openings in the members have been shown,but it will be understood that each of the ring members 1s preferablyprovided -with such an opening. These openings are. ,ofi'set from eachother in assembling, as shown in Figs. 1 and 4c, and preferably will bedistributed throughout substantially the entire length of the core 111Specification of Letters Patent.

Patented July '7, 1914.

Application filed. December 20, 1912. Serial No. 737,875.

order that the heating which may be produced by the flux crossing theseopenings may be equally distributed. The members 2 of the core sectionsare of such sizes as to closely nest together as shown in Fig. 3. Thesection. however, is not made solid in that when finished its crosssection is substantially semi-annular as shown in Fig. 3. Preferably asshown in Fig. 3, the adjacent members of each section are of differentdepths, and similar members of the two sections are of complementarydepths, the two sections joined together forming a structuresubstantially solid and annular in cross section. The cross sectionalrelation of the members prior tothe assembling of the sections togetheris clearly shown in Fig.3, and

a cross section of the. complete core isshown section by reason of beingmade intwo sections.

Within the hollow ring core is placed one set of primary and secondarywindings 4. This set of windings lies in the general plane of the ringcore, and the primary thereof, therefore, tends to produce flux in theplane of the drawing of Fig. 2. On the outside of the core is placedanother set of primary and secondary windings 5, the various turns ofwhich are substantially in the radial planes of the ring core. Theprimary of this set of windings, therefore, tends to produce flux in thecore in planes parallel to the drawing of Fig. 1. Each primary acts toinduce an electromotive force in its own secondary and tends to havealone substantially no effect upon the secondary of the other set ofwindings; each primary tends to produce flux in the single core at aright angle to the flux producing tendency of the other primary.

The mode of connection of the windings to the circuits is substantiallyimmaterial.

It is apparent that in this construction space and material are botheconomically employed. 1

What I claim as new and desire tosecure by Letters Patent of the UnitedStates, is

1. In a transformer, a core, a set of primary and secondary windingsthereon, and

another set of primary and secondary windings also thereon andmagnetically at substantially right angles to the first set of primaryand secondary windings;

2. In a transformer, a core built up of laminations, a set of primaryand secondary windings thereon wound in a direction substantially atright angles to the laminations, and another set of primary andsecondary windings wound in a direction substantially at right angles toboth thelaminations and the direction of winding of the firstrmentionedset of windings. I

3. In a transformer, a core, a set of primary and secondary windingsthereon, the

primary tending to produce a)flux therein in one direction, andanotherset of primary and secondary windings also thereon, the primary thereoftending to produce a flux in the core at an angle to the direction ofthe flux from the first-mentioned primary.

4. A transformer having a core substantially in the form of a ring, aset of primary and secondary windings thereon substantially in the planeof the core, and a set of primary and secondary windin s on the corewound in a plane or'planes suhstantially at right angles to the plane ofthe ring.

5. A transformer,having a core substantially in the form of a ring, thegore being discontinuous in a plane or planes substantially parallel tothe general plane of the core and in a radial plane or planes, a set ofprimary and secondary windings thereon substantially in the plane of thecore, and a set of primary and secondary windings on the core wound in aplane or planes substantially at right angles to the plane of the ring.

6. A transformer having a core composed of two sections each having asubstantially semi-annular cross section and each being composed ofnested hollow rings discontinuous throughout their lengths, the sectionsbeing joined together to form a ring of a substantially annular crosssection, a set of primary and secondary windings located within thecore, and a set of primary and secondary windings wound in substantiallyradial planes about the core.

In witness whereof, I have hereunto set my hand this 16th day of Dec,1912.

' SVEND E. J OHAN NESENU Witness-es:

LLOYD M. Krntoonn,

l KNoLLMEYnn,

